LM3405A
- VIN Operating Range of 3 V to 22 V
- Drives up to 5 High-Brightness LEDs in Series at 1 A
- Thin SOT-6 and MSOP-PowerPAD™-8 Packages
- 1.6-MHz Switching Frequency
- EN/DIM Input for Enabling and PWM Dimming of LEDs
- 300-mΩ NMOS Switch
- 40-nA Shutdown Current at VIN = 5 V
- Internally Compensated Current-mode Control
- Cycle-by-Cycle Current Limit
- Input Voltage UVLO
- Overcurrent Protection
- Thermal Shutdown
The LM3405A is a 1-A constant current buck LED driver designed to provide a simple, high efficiency solution for driving high power LEDs. With a 0.205-V reference voltage feedback control to minimize power dissipation, an external resistor sets the current as needed for driving various types of LEDs. Switching frequency is internally set to 1.6 MHz, allowing small surface mount inductors and capacitors to be used. The LM3405A uses current-mode control and internal compensation offering ease of use and predictable, high performance regulation over a wide range of operating conditions. With a maximum input voltage of 22 V, the device can drive up to 5 High-Brightness LEDs in series at 1-A forward current, with the single LED forward voltage of approximately 3.7 V. Additional features include user accessible EN/DIM pin for enabling and PWM dimming of LEDs, thermal shutdown, cycle-by-cycle current limit and overcurrent protection.
技术文档
| 顶层文档 | 类型 | 标题 | 格式选项 | 下载最新的英语版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 数据表 | LM3405A 1.6-MHz, 1-A Constant Current Buck LED Driver With Internal Compensation in Tiny SOT and MSOP-PowerPAD™ Packages 数据表 (Rev. D) | PDF | HTML | 2016-9-19 | ||
| 白皮书 | 常见 LED 功能和 LED 驱动器设计注意事项 | 英语版 | 2020-9-21 | |||
| 应用手册 | AN-1656 Design Challenges of Switching LED Drivers (Rev. A) | 2013-5-3 | ||||
| 应用手册 | Powering & Dimming High-Brightness LEDs w/ LM3405 Constant-Current Buck Reg (Rev. A) | 2013-5-1 | ||||
| 用户指南 | AN-1685 LM3405A Demo Board (Rev. B) | 2013-5-1 | ||||
| 应用手册 | AN-1982 Small, Wide Input Voltage Range LM2842 Keeps LEDs Cool (Rev. A) | 2013-4-23 | ||||
| 用户指南 | LM3405A Reference Design for MR16 LED Bulb, 600mA User Guide | 2012-1-27 | ||||
| 应用手册 | Application Note 1899 LM3405A eMSOP Evaluation Board (cn) | 2009-7-6 | ||||
| 应用手册 | Application Note 1685 LM3405A Demo Board (cn) | 2007-10-19 |
设计与开发
如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。
LM3405AEVAL — 具有内部补偿的 1.6MHz、1A 恒流降压 LED 驱动器评估模块 （采用小型 SOT-23 封装）
The LM3405A demo board is configured to drive a series string of high power, high brightness LEDs at a forward current of 1A using the LM3405A constant current buck regulator. The board can accept a full input operating range of 3V to 22V. The converter output voltage adjusts as needed to maintain (...)
LM3405AXMYEVAL — LM3405AXMY - 具有 eMSOP 封装的 1.6 MHz、1A 恒流降压 LED 驱动器 EVM
LM3405A is a 1A constant current buck LED driver designed to provide a simple high efficiency solution for driving high power LEDs. With a 0.205V reference voltage feedback control to minimize power dissipation, an external resistor sets the current as needed for driving various types of LEDs. (...)
| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| HVSSOP (DGN) | 8 | Ultra Librarian |
| SOT-23-THN (DDC) | 6 | Ultra Librarian |
订购和质量
推荐产品可能包含与 TI 此产品相关的参数、评估模块或参考设计。